Combination lock



Aug- 1948- I M. DE WRANGELL 2,447,785v

COMBINATION LOCK Filed Aug. 2, 1938 'IIIIIA III/IIIIIIIIIII,'l/IIIIIIIIIIIIIIIIIII!!! I MI/EA/TOE Aura/e u MRI/veil! Patented Aug.24, 1948 COIWBINATIQN LOCK Mathieui de Wrangell, Paris, France, assignorto Dw, Clichy (Seine), France, a French company with limitedresponsibility Application August 2, 1938, Serial No. 222,681

, In France August 2,1937

Section 3, Public Law 690, Augu te, 1946 Patent expires August 2, 1957The object of the present invention is an improvement to looks of thedouble operation type,

1. eV of the type capable of operating either as a combination lock oras a free lock, the improvement referring especially to the type of lockcomprising a movable locking member, the displacement of which isdependent upon a combination device and which operates with a boltmovable with respect to said locking member. n

The improvement according to the invention permits the realisation of adouble operating lock of the type set forth, which is of a simple androbust construction and easy in operation.

The lock according to the present invention is characterized by the factthat the locking member of the lock comprises, at the end next to thebolt, a movable stop member adapted to block the bolt in the closingposition when the lock operates as a combination lock, and capable ofbeing moved clear from the path of the bolt after backward movement ofsaid locking member into the blocking discs in the position of theselected combination, for permitting the free movement of the bolt inspite of a later disengagement of said locking member from said blockingdiscs and the mixing up of the combination.

The effect of this arrangement is to simplify the construction of thelook while permitting the spring provided for pushing the locking memberinto the blocking position of the bolt to remain in a nearly expandedposition during the operation as a free lock. On the other hand, thisarrangement will permit an elastic mounting of the swinging or pivotingstop member, movable with respect to its actuating knob, therebypermitting, as will be seen below, to pass instantaneously and withoutcperatingthe combination, which may be mixed up, from the operation as acombination lock to that of a free lock.

On the drawing an embodiment of the invention has been represented byway of example.

Figures 1, 2 and 3 are diagrammatic plan views, in three difierentpositions to be described below, of a double operating lock particularlyadapted for drawers, suit cases, doors and the like, while Figure 4 is asectional elevation along the plane IV--IV, partly broken away, of theright hand side of Figure l.

The lock shown comprises a locking member II4 free to move with respectto the base plate I69 of the lock and the stepped part II3 of which 3Claims. (G1. 70-310) is adapted to cooperate in a known manner with thenotches N3 of the flanged locking discs I55, I56, I51 also arranged intheform of steps and actuated from the outside by the combination'discsI55, I56, I51 (Figure 4) respectively. The front part of thelockingmember II4 carries a rotating stop piece I45 adaptedto cooperate withthe bolt I 42 of the lock and actuated by the pin I44. ,The rotation ofthis stop piece I45 is guided by a lug, I41 of the locking elemerit I I4against which may abut either the nose I46 or the nose I48 of piece I45,while the bolt I 42 is provided on its side with an edge of a notch I49which, when the bolt is moved downward, will strike against the nose I46of piece I45 when the latter lies in the locking position shown inFigure 1. The piece I45 carries a slot I45 engaged by a flattened partof the pin I44 provided with a small handle I44; a spring I45" restingon the right part of piece I45 pushes the latter towards the leftagainst the bolt I42.

In t e position of Figure 1, the locking nose I46, engaged under thenotch I49 of bolt I42, maintains the latter closed; the steps II3 abutagainst the locking discs I55, I56, I51 and prevent any backwardmovement of the locking element I I4 towards the right and subsequentfreeing of the nose I46.

If, in forming the combination, the slots 3' formed in the edges of thethree discs I55, I56, I51 are brought in alignment before the steps I I3and the lever I44 is pushed towards the right, the locking element H4and the piece I45 will both be moved to the right; until the nose I46has cleared the notch I49 of the bolt, the lever I44 will be displacedparallel to itself, it will then swing to the right and the nose I46will then occupy the inclined position shown in Figure 2.

If the lever I44 be then permitted to return towards the left whilemaintained inclined towards the right, the nose I46 will abut againstthe side of the bolt I42, the lever I44 being in the middle of slot I45,and the locking element II4 will resume its initial position under theeffect of the spring I24 (Figure 3), the steps II3 being again clear ofthe discs I55, I56, I51, while the combination of the latter may againbe mixed up.

As long as the nose I46 is in the position of Figure 3, the bolt I42 maybe actuated freely by means of its button I5I and the lock will operateas if it were not a combination lock.

When it is desired to look again the bolt, it is only necessary torotate the lever I44 to the left; this being possible due to thepresence of the slot I45 permitting the pivoting member. I45 to moveelastically towards the right, the: nose M6 will thus engage again thenotch I49 into which it is pushed by its spring I45", resuming theposition of Figure 1; the lock can then only be opened by the personknowing and forming v the unlocking combination.

What I claim is:

1. A combination lock comprising a number oi combination discs, a numberof locking discs connected with said combination discs respectively, alocking member cooperating with said locking discs and free to movetowards the latter when they are in the desired combination posi.--tion, a bolt separate from said locking member, a movable stop piececooperating with saidbol-tt to maintain it in its closing position,means for bringing said movable stop piece in. a. position rendering theopening and closing; movements, of said-bolt. free, and operative onlyafter moving. saidlocking member towards said locking discs: in thecombination position; and means for maintaining the first said means. insaid position. corresponding to; the. free movement of said bolt inorderto allow the. free movement of saidbolt to subsist: inspite of the backmovement of said locking member to its initial locking position and ofthe mixing up of the combination discs.

2. In a combination lock according to claim 1, elastic means cooperatingwith said movable stop piece and permitting the latter to be broughtback, without necessity of forming the combination. from its position,corresponding to the free movement of said bolt into its initial,position in which said free movement of said REFERENCES CITED Thefollowing references are of record; in the file oi this patent;

UNITED STATES PATENTS Name Date, Magaro June 26, 1906 Tobias; ..e r Aug.27, 1907 Hoschek June 15, 1915 Albanese Oct. 26, 1915 Ikeda v Apr. 16',19 18 Number

